Question

If a certain recipe takes 1 1/2 cups of flour and 2 cups of milk, how much milk should be added if the cook only has 1 cup of flour?

Answer 1

1 1/3 cups of milk

Explanation:

In our recipe

For every 1 1/2 cups of flour we need 2 cups of milk

then the flour and milk are two proportional quantities

1 1/2 ————-> 2

We know that 1 1/2 = 1/2 + 1/2 + 1/2 then

1/2 + 1/2 + 1/2 ————-> 2

Then (we divide both sides by 3)

1/2 ————-> 2/3

Then (we multiply both sides by 2)

1 ————-> 4/3

finally , 4/3 = 1 1/3